Add Python 3.8 env in Travis CI test matrix.
At present the pinning of flake8 disallows running of lint on
Python 3.8 systems.
Update flake8 ignore-list to ignore W504 instead of W503, the PEP
guidance is that either is ok, but there must be local consistency.
There are more occurences of binary operator before line-break
than after in this repository, and we have also chosen to ignore
W504 in most of our other repositories.
Previous attempts to fix LP Bug#1784083 added a workaround (commit
820ed808) which is being removed here.
The root cause seems to be upstream in the dragent. It may never have
been envisioned to run the agent by itself the way the charm does.
So that even if neutron-api completes its amqp relation first,
neutron-dynamic-routing can still see
oslo_messaging.exceptions.MessagingTimeout errors. Some operation
must occur against neutron before dragent is truly ready. i.e. some post
deploy openstack command. So it is outside the purview of the charm.
This change adds a service restart late.
Partial-Bug: #1841459
Execute a list of functions after series upgrade if one is
supplied. This change is driven by the upgrade testing of vault.
Vault needs to be unsealed after it is rebooted.
During the series upgrade tests, zaza pauses subordinate services.
However, the cinder-ceph charm has no pause/resume action, and so the
test fails. This PR adds a blacklist that ensures that the cinder-ceph
subordinate is not paused during series upgrade.
